Growth of glycine picrate crystal by conventional and SR method

摘要

Single crystals of an organic nonlinear optical (NLO) material, glycine picrate (DGP) has been grown from mixed solution by using the novel uniaxial crystal growth method of Sankaranarayanan and Ramasamy (SR) and conventional method. The novel method allows the crystal to grow in one specified axis with well developed faces. The grown crystals have been subjected to crystal structure studies and characterized by single crystal X-ray diffraction, Powder X-ray diffraction (PXRD), UV-Vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), Thermogravimetric/differential thermal analysis (TG/DTA), Vickers microhardness, dielectric measurements, etching and High-resolution x-ray diffraction (HRXRD). The NLO efficiency of the crystal has been confirmed by using the Kurtz powder technique. The present study indicates that the SR method is superior to conventional method for the growth of DGP single crystals.